AUTOTERM 4D Diesel Warm Air Heater / 12 V / 4 kW / incl. bracket
SVB item number: 42956
The powerful 4D diesel air heater from Autoterm Air is ideal for larger boats from approx. 7.5 metres. Power levels and temperature control can be easily adjusted with the heater. Maximum heat output: 4.0 kW. Voltage: 12 V. Supplied with control element and bracket. Product details
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Available variants
Product data
- SVB item number 42956
- Description AUTOTERM AIR - 4D diesel warm air heater incl. bracket
- Fuel Diesel
- Operating voltage 12 V
- Heating capacity (continuous operation) 1 - 4 kW
- Airflow 70 - 168 m³/h
- Power consumption 10 - 57 W
- Fuel consumption 0.12 - 0.51 l/h
- Boost function No
- Number of outputs 1
- Inlet-Ø 83 mm
- Outlet-Ø 100 mm
- Exhaust-Ø 24 mm
- Length 402 mm
- Width 157 mm
- Height 186 mm
- Weight 5.5 kg
- For boats 7.5 - 15 m
Product details
The powerful 4D diesel air heater from Autoterm Air is ideal for larger boats from approx. 7.5 metres. The digital control panel (incl. temperature sensor) makes it very easy to adjust the power levels and control the temperature. The air heater is certified (e2) and can be installed without registration. The hole dimensions are identical to those of the popular Webasto or Erberspächer heaters, so it is easy to replace without having to drill new holes. Delivery includes an altitude kit, an exhaust silencer and all the components needed for installation. A minimum diameter of 90 mm is recommended for connecting hot air pipes. The connection adapter for the warm air side to reduce from 96 mm to the standard dimension of 90 mm, as well as a fuel tank, are not included in the delivery.
The heater's cable harness features a gate input for connecting your own remote control or other secondary control unit. You can choose whether the connection is made via ON/OFF switch or pulse. The advantage of the latter means that it is possible to operate the heater with different controllers. For example, you can switch on with a remote control or a push-button and later adjust power levels or even switch off from your bed using the included control element.
In addition, the air heater is equipped with a so-called altitude kit. Thanks to this altitude kit, the heater automatically reduces the quantity of fuel injected depending on the ambient air pressure. This prevents or drastically reduces the likelihood of the combustion chamber from clogging with carbon particulate in the event of a falling air oxygen content.
Maintenance is not normally necessary. However, to prolong service life the combustion chamber must be allowed to get really hot from time to time to burn off any residues. As a rule, running the heater at full power for at least half an hour once every week or every two weeks is enough to allow the combustion chamber to reach full temperature again.
Supplied with new control unit
The new Comfort Control boasts a modern design and numerous functions, such as three adjustable timers, extended heating modes, fan functions and much more. The intelligent thermostat function, for example, automatically switches the heating on when the temperature falls below a set number and similarly turns it off once a set temperature is reached. Multifunctional rotary knob with grippy rubber coating and OLED display. Small installation dimensions, easy to use, stylish design. Temperature sensor included. The cable length of the control panel is 1.8 metres.
Technical Data
Included in delivery
Note
In order to avoid drilling large holes for the connectors when installing the dosing pump wire harness, a connector housing has not been partially installed on one side. It is included with the delivery and can be found in a small bag.
Polarity need not be observed when installing the contacts in the plug housing.
The heater's cable harness features a gate input for connecting your own remote control or other secondary control unit. You can choose whether the connection is made via ON/OFF switch or pulse. The advantage of the latter means that it is possible to operate the heater with different controllers. For example, you can switch on with a remote control or a push-button and later adjust power levels or even switch off from your bed using the included control element.
In addition, the air heater is equipped with a so-called altitude kit. Thanks to this altitude kit, the heater automatically reduces the quantity of fuel injected depending on the ambient air pressure. This prevents or drastically reduces the likelihood of the combustion chamber from clogging with carbon particulate in the event of a falling air oxygen content.
Maintenance is not normally necessary. However, to prolong service life the combustion chamber must be allowed to get really hot from time to time to burn off any residues. As a rule, running the heater at full power for at least half an hour once every week or every two weeks is enough to allow the combustion chamber to reach full temperature again.
Supplied with new control unit
The new Comfort Control boasts a modern design and numerous functions, such as three adjustable timers, extended heating modes, fan functions and much more. The intelligent thermostat function, for example, automatically switches the heating on when the temperature falls below a set number and similarly turns it off once a set temperature is reached. Multifunctional rotary knob with grippy rubber coating and OLED display. Small installation dimensions, easy to use, stylish design. Temperature sensor included. The cable length of the control panel is 1.8 metres.
Technical Data
| Voltage | 12 V |
| current consumption (watts) | 10 - 57 W |
| Heating capacity | 1 - 4 kW |
| Airflow rate | 70 - 168 m³/h |
| Fuel consumption | 0.12 - 0.51 l/h |
| Air intake | 80 / 83 mm |
| Hot air outlet | 96 / 100 mm |
| Dimensions | 402 x 157 x 186 mm |
| Weight of the heater (without accessories) | 5.5 kg |
Included in delivery
- 12 V heater
- Comfort Control control unit / Cable length: 1.8 m
- Autoterm fuel pump
- Exhaust silencer (170 x 90 x 50 mm)
- Dosing pump rubber holder
- Dosing pump wire harness
- 1.8 m heater wire harness
- Intake air hose with integrated silencer
- Heat protection hose
- End piece exhaust pipe + clamp
- Tank intake pipe
- 5.5 m fuel line
- Fuel line connector
- 1 m corrugated metal exhaust pipe
- Screws, nuts, brackets, heat shrink tubing, cable ties
- Instruction manual
- Bracket
Note
In order to avoid drilling large holes for the connectors when installing the dosing pump wire harness, a connector housing has not been partially installed on one side. It is included with the delivery and can be found in a small bag.
Polarity need not be observed when installing the contacts in the plug housing.
Features
Discover the features that make this product stand out. From technical details to special functions – we’ve summarized all the key information for you.
Fuel
Diesel
Operating voltage
12 V
Number of outputs
1
For boats
7.5 - 15 m
Documents
Product safety
by
Heinz-Joachim U.
10/22/2025
Verified purchase
Variant:
42956
in use on a Nimbus Boats AB - Nimbus 3003
10/22/2025
Verified purchase
Variant:
42956
in use on a Nimbus Boats AB - Nimbus 3003
Images for this rating
by
Eugeni G.
4/14/2023
Verified purchase
4/14/2023
Verified purchase
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Comparison
Availability / Price
Item no.
42956
42955
Customer ratings
Description
AUTOTERM AIR - 4D diesel warm air heater incl. bracket
AUTOTERM AIR - 2D diesel warm air heater / incl. bracket
Width
157 mm
120 mm
Fuel
Diesel
Diesel
Heating capacity (continuous operation)
1 - 4 kW
0.8 - 2 kW
Height
186 mm
145 mm
For boats
7.5 - 15 m
2 - 7.5 m
Weight
5.5 kg
2.9 kg
Length
402 mm
330 mm
Operating voltage
12 V
12 V
Inlet-Ø
83 mm
60 mm
Outlet-Ø
100 mm
60 mm
Airflow
70 - 168 m³/h
34 - 86 m³/h
Boost function
Number of outputs
1
1
Power consumption
10 - 57 W
10 - 29 W
Fuel consumption
0.12 - 0.51 l/h
0.1 - 0.24 l/h
Exhaust-Ø
24 mm
24 mm
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